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Sirius Black Seeds

From:  10.00

Sirius Black, named after the mysterious Harry Potter character and thought to be a dark purple in hue, is a popular cannabis strain. The Portland, Oregon-based Sirius Black Project funded its development in the 1980s. Yet it has proceeded with caution regarding Sirius Black’s DNA. The truth remains that this strain is highly fragrant and produces a lingering body high, regardless of its purported origins. The results of the THC content analysis are between 15% and 25%.

Sirius Black Seeds

Shipping info

Various shipping options & lost mail replacement.

USA customers spend over $120 to get free tracked shipping. Tracked delivery costs $12 for orders under $120.

Non USA customers - get free standard shipping on orders over $65. Orders over $115 get free Tracked shipping.

Usually seeds arrive within ten days. Did not receive your seeds? We will happily replace your seeds. See FAQ

  • EU  3–5 days
  • USA & Canada 6-10 days
  • Rest of the world 7–10 days

Why choose us?

We have been in the business for over 15 years, this has helped us build a relationship with other big brands and breeders in this space. We can bring you the best marijuana seed discounts you can find on the web!

Where else will you find a deal like ours?

  • Buy 1, get 1 FREE
  • Lost mail replacement

If you have any questions, do not hesitate to contact us!

Choosing seeds

Feminized seeds
When given less than 12 hours of light every day, feminized seeds bloom and produce weed. Gather either in the fall outside or indoors after around 15 to 20 weeks. Feminized strains are used by beginners & experienced growers and produce higher-quality buds than auto-flowering strains.

Automatic seeds
Easy to grow and simple plants can be cultivated from auto-flower seeds in just 10 to 14 weeks before they are ready to be picked. Fantastic for first-time cultivators, limited harvesting areas, and seasonal yields.

How to germinate

To ensure germination, immerse the seeds in a glass of water for at least 12-72 hours while keeping them in the dark at room temperature. When the whitetail appears, plant your seeds 1/2 inch deep in the soil or another medium that has been moistened. You should see a seedling emerge within 2 days after planting. Seedlings thrive in bright, sunny conditions (21°C to 23°C)

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Sirius Black Cannabis Strain

Sirius Black is a popular variety, taking its name from the mysterious Harry Potter character and the resulting cannabis color. In the 1980s, it was a piece of a Sirius Black Project in Portland, where it was developed. As for the genetic makeup of Sirius Black, it has been cautious. Although its origins may be shrouded in mystery, the fact remains that this strain is extremely aromatic and produces a euphoric high that stays with the user for quite some time—the results of the THC analysis range from 15% to 25%.

Whether its name comes from its dark coloration, Sirius Black flowers are beautiful. This strain’s true, authentic buds are pretty large overall but narrow at the tip, like miniature pine cones. The classic Indica shape, with leaves that spiral inward around the central stems, has been preserved in these plants. The faintest hint of green among the uniformly dark purple (almost indigo) leaves. Its peculiar hue is the result of a high concentration of pigments called anthocyanins. Lastly, the cloudy, transparent trichomes and golden yellow pistils covering their entire surfaces can identify these lovely flowers.

Growing Sirius Black Seeds

The feminized variant of the Sirius Black marijuana strain is easy to grow. It produces yields of around 400 and 500 grams of finished product per square meter when grown indoors and between 700 and 900 grams of finished product per plant when grown outdoors. After 56 to 70 days of flowering, this cannabis will produce tall buds high in THC and ready to be harvested. You will have the opportunity to get some fem Sirius Black marijuana seeds right here. When cultivating plants indoors, utilizing the LST technique to develop in a consistent plane and increase crop size is recommended by Garden of Green Seeds Bank for achieving the best possible results.

Sirius Black Flavor and Effect

Sirius Black has an overwhelmingly fruity, sweet scent. The potpourri has a pleasant aroma thanks to the combination of grape and berry top notes and a woodsy base note. Crushing these buds release more of their savory, earthy aroma. Sirius Black, whether smoked in a pipe or a blunt, generates smoke that is mild and easy to inhale. This thick smoke has a sweet floral and fruity aftertaste.

The full benefits of this flavorful smoke may not be felt for some time. Within 10 minutes of exposure to Sirius Black, many people experience symptoms of high pressure in the brain, such as cramps in the temples or blushing of the cheeks. Users may experience alien changes in their sensory awareness as these peculiar tics gradually fade, including a flat of spatial awareness and other audio and visual aberrations. Relaxing with like-minded friends in this trippy setting is easy when a decent playlist is playing in the background. With their minds slightly stimulated by Sirius Black, users may find they are more comfortable striking up conversations with others, whether they are long-lost friends or strangers. The sedative and muscle-relaxing indica effects of Sirius Black grow more robust with repeated use (or increased dosage). Those who smoke while on the move or standing may feel an overwhelming want to sit down immediately. Due to the stress-reducing properties of this bud, you can unwind completely and breathe deeply without worrying. Given the right circumstances, one can fall asleep unexpectedly or experience an inexplicable bout of couchlock. Sirius Black’s laid-back atmosphere makes it ideal for nighttime listening.

Sirius Black, due to its sedative properties, could be of benefit to medicinal marijuana patients. Physical and mental stress, including that associated with depression, anxiety, and post-traumatic stress disorder (PTSD), are momentarily alleviated by using this strain. In the meantime, its euphoric effects on the body allow you to forget about the pain, whether it’s acute (from an injury) or chronic (from a disease) (from a condition like arthritis or fibromyalgia). In the correct circumstances, Sirius Black may help people relax into sleep and have a restful night’s sleep. This strain is less likely to cause excessive, circular thinking, making it a good option for people prone to panic attacks or paranoia.

Additional information

Indica dominant


3 + 3 FREE, 5 + 5 FREE, 10 + 10 FREE, 15 + 15 FREE, 25 + 25 FREE, 50 + 50 FREE, 100 + 100 FREE, 200 + 200 FREE, 500 + 500 FREE, 1000 + 1000 FREE

Flowering Time

56-66 days


21-24 %

Yield indoor

550-650 g/m²

Yield outdoor

500-800 g/m²

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Sirius Black Seeds

From:  10.00

Sirius Black Seeds